Sewing-machine.



D. NOBLE.

SEWING, MACHINE.

APPLICATION FILED 111N325, 1910.

Patented Feb. 13, 1912.

2 SHEETFSHEET 1.

INVENTOR Jana 8oz ATTORNEY WITNESSES:

D. NOBLE.

SEWING MACHINE.

APPLIGATION FILED JUNE 25, 1910.

Patented Feb. 13, 1912.

2 SHEETS-SHEET 2.

WITNESSES:

ATTORNE Y WED STATES PATEN "1 orrron DONALD NOBLE, OF BRIDGEIPORT, CONNECTICUT, ASSIGNOR TO THE SINGER MAN UFAC TUBING COMPANY, A CORPORATION OF NEW JERSEY.

SEWING-MACHINE.

Specification of Letters Patent.

Patented Feb. 13,1912.

Application filed June 25, 1910. Serial No. 568,784.

ing at Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in S ewing-Machines, of which the following 15 a specification, reference being had therein to the accompanying drawings.

This invention relates to improvements in sewing machines and has to do particularly with the mechanism employed for present ing the fabric to the action of the stitchforming mechanism, and consists in providing upper four-motion feeding devices with compensating feeding cloth-pressers, and is intended as an improvement on that class of feeding mechanism represented by U. S. Patent No. 651,808, dated June 12, 1900, to Donald Noble.

The object) of the present invention is to provide upper four-motion feeding devices with the same mechanical control of the fabric as that common to under four-motion feeding devices, so that either form of feeding mechanism will be practical for use in connection with productions which require that the superposed plies of material be advanced to the action of the stitch-forming mechanism as one body.

Althoughthe invention is herein shown in connection with a needle and needle-carrying bar mounted and controlled to assist in the operation of feeding the fabric. it is to be understood that it is not limited in this respect, as the stitch-forming mechanism may employ a needle-carrying bar having 7 movements in a given plane only, as is represented by U. S. Patent No. 670,340, dated Mar. 19, 1901, to Catenacci et al, No. 811,026, dated Mar. 6, 1906, to C. A. Dearborn, or No. 829,937, dated Aug. 28, 1900, to S. Arnold.

As the elements comprising the improved mechanism and those for effecting its mechanical control are arranged upon the head or free end portion of the sewing machine bracket arm, it has been deemed suflicient to illustrate only suchparts andfree end portion.

In the'laccompanying drawings illustrating the invention, in the several figures of which like parts are similarly designated, Figure 1 is a view, in front end elevation, on a reduced scale, of the head or free end portion of a sewing machine bracket arm equipped with the lmproved mechanlsm. Flg. 2 is a vlew similar to Fig. 1, except that certain elements shown in the latter' figure have been omitted to better illustrate those employed for connecting the sewing machine actuating shaft with the needlebar, feed-bar and presser-bar, together with the throat-plate, slide-plates and the front end portion of the sewing machine bed-plate. Fig. 3 is a perspective of the feed-bar and the feeding cloth-pressers carried by said bar. Fig. 4 is a perspective of the clothpresser. Fig. 5 is a perspective of the auxiliary feeding cloth-presser. Fig. 6 is a view, in rear side elevation, of the oscillating feedbar frame, together with the feed-bar, needle-bar and oscillating feed-bar frame link. Fig. 7 is a view, in front side elevation, of the presser-bar yoke and coacting slideblock. Fig. 8 is a perspective of the presserbar yoke collar. Fig. 9 is a perspective of the presser-bar yoke collar stud screw and nut. Fig. '10 is a view, in side elevation, looking from the rear of the machine, of the stitch-regulating lever and the bracket and screws for controlling its adjustment.

1 represents the head or free end portion ofthe sewing machine bracket arm, 2 the sewing machine actuating shaft, 3 the sewing machine cloth or bed plate, 4 the throatplate, 5 the front and 6 the back slideplate, 7 the presser-bar which is hollow for a portion of its length, shown partially in section in Fig. 1 to bring to view the presser-bar spring 8 which is seated upon the bottom wall of said hollow portion.

9 is the presser-bar bushing which is secured by screw 10 in the head 1 and at its lower end receives the upper end of the presser-bar 7, 11 the presser-bar spring adjusting rod threaded into theupper end of said bushing and held in adjusted position by the screw 12, the lower end of said rod acting upon said presser-bar spring to resiliently hold said presser-bar in its depressed position.

13 represents the presser-bar yoke collar secured by screws 14 upon said presser-bar and provided with a guide arm 15, the outer end 16 of which latter enters a guide slot 17 formed in the head 1 (see dotted lines, Fig. 2).

. 18 is the presser-bar lifter lever pivoted upon the screw 19, said lever acting on the prcss er-bar lifter bracket 20, the inner end of which latter encircles said presser-bar,

the upper member of said bracket being provided with a guide pin 21 which passes loosely through an opening 22 in the arm 15.

23 represents the cloth-presser secured by 1s)crew 24 to the lower end of the presser- 26 represents an oscillating feed-bar frame pivoted to the head 1 by stud 27, which latter passes through the opening 28 formed in said head and is held against accidental movement in the direction of its length by a stop collar 29. In suitable bearings formed in the opposite ends of the frame 26 is mounted the needle-bar 30 carrying the eye pointed needle 31 and in similarly alined separate bearings formed in said frame is mounted the feed-bar 32 which is hollow the spring 38 to resiliently hold the presser' 3'7 downward to the limit of movement permitted by the stop screw 39 threaded into the bracket 34, the bar 36 and cloth-presser 37 being guided in their vertical movements,

I independent of the like movements of the feed-bar, by a notch 40 which rides the inner edge 41 of the bracket 34.

42 and 43 represent needle openings in the feeding eloth-pressers 35 and 37, respectively.

Upon the needle-bar 30 is secured, by screw 44 which passes through'the needlebar link bearing 45, a collar 46 provided with a guiding element 47 which enters a groove 48 formed in-the frame 26, and upon the feed-bar 32 is secured, by screw 49, a collar 50 provided with a stud 51 and guiding element 52, the free end of whichlatter enters a groove 53 formed in the frame 26.

54 represents a commonly employed takeup cam, carried by the actuating shaft 2, for giving movements to the needle thread takeup 55.

56 represents the needle-bar link connection, the lower end of which is fulcrumed upon the bearing 45 of the needle-bar collar 46, its opposite end being provided with a projecting stud 57 (shown in dotted lines, only) which loosely enters a suitable opening (not shown) formed in the eccentric 58, the latter being secured by screws 59, 59 to the outer face of the take-up cam 54, thus, through the rotation of the shaft 2, transmitting vertical movements to the needle-bar 30.

An eccentric strap 60 is mounted upon the eccentric 58 and provided with connections 61. and 62, the latter of which, at its outer end, is mounted upon the inner end of the stud 63. The body portion of the stud 63 is of substantially the same diameter as the width of the cam slot 64 of the cam bracket. 65, which latter is secured by screws 66 and pin 67 to the head 1.

Upon the outer end of the stud 63 is fulcrumed the upper end of the oscillating frame cam link 68, the opposite end of said link being pivotally mounted upon a bearing 69 formed integrally with a feed-adjusting link 70 which, in turn, is fulcrumed upon a stud 71 carried by the feed-adjusting lever crank arm 72, the latter having formed integrally with it a stud 73 which is mounted in and passes through a suitable bearing 74 formed in the head 1 (see dotted lines, Fig. 2). Upon the free end of the stud 73, the portion extending out from the rear side of the head 1, is mounted the feed-adjusting lever 75, the flat surfaces 76 and 77 of which act to hold said lever against axial movement upon the stud 73.

The feed-bar oscillating frame link 7 8 is provided at one end with a stud 79 and at its opposite end with a stud 80. The stud 80 loosely enters an opening 81 formed in the hub bearing 69 and the stud 79 enters an opening 82 formed in the frame 26, thus, through the rotation of the shaft 2, movements are transmitted to the stud 63 in the cam slot 64, which causes the link 68 to rock the feed-adjusting link 70 upon the pivot 71 and, through the link 78, give to the frame 26 oscillating movements.

The amplitude of the feed movements of the frame 26 are controlled by the adjustment of the lever 75 which causes the axis of the pivot 71 to change relationship with respect to the axis ofthe stud 79; and for securing the lever 75 in a given adjustment, as shown inFig. 10, or to limit its movements in opposite directions, there is provided a bracket 83 loosely mounted upon the stud 73 and provided with an arcuate slot 84 through which pass a screw 85 threaded into said lever and a stop screw 86 threaded into the head 1; also the opening between the wall 87 of the slot 84 and the wall 88 of the lever 75 may be lengthened so as to predetermine the adjustment of said lever from one to another given length of stitch.

89 represents the presser-bar yoke pivoted by-a stud bolt 90 and nut 91 upon the arm 15 of the presser-bar collar 13, the fork 92 of dotted lines, Fig. 2) formed in the outer end of the connection 61, thus the eccentric 58, through the connections previously pointed out, is caused to transmit rocking movements to the yoke 89.

To operatively connect the feed-bar 32 with the yoke 89, the stud 51 of the feed-bar collar is provided with a slide block 101 which enters the fork 102 of said yoke, whereby rocking movements are transmitted from the eccentric 58 to the yoke 89 carried.

by the belt 90 mounted in the arm 15 of the collar 13. 1

The relationship of'the collar 50, carried by the feed-bar 32, with respect to the axis of the bolt 90 is such that when the yoke 89 occupies the position shown in dotted lines, Fig. 2, the pressers 23, 35 and 37 will be held slightly above the fabric, but as the fork 92 is moved to the right the presser 23 is forced down upon the fabric, and the-further movement of said fork causes the feedbar to be raised as the frame 26 is moved backward a distance corresponding with the length of the stitch, by which time the fork 92 has returned to the position shown in Fig. 2, and its further movement to the left causes the pressers 35 and 37 to be forced down upon the fabric and moves the presserbar 7 vertically as the frame 26 is oscillated to feed the fabric, thus causing alternate vertical movements of the presser-bar 7 and feed-bar 32, and a feeding movement of the latter'during the time that the presser 23 is free from the fabric.

I claim 1. In a two needle sewing machine, an upper four-motion feeding device including a vertically actuated feed-bar carrying at its lower end a yieldingly mounted and a rigidly secured feeding cloth-presser, and a vertically actuated cloth-presser bar mounted in the head of the bracket-arm of the sewing machine and provided with a cloth-presser, the vertical movements of said cloth-presser bar alternating with the like movements of said feed-bar to advance said frame and operatively connected with said shaft to move vertically, said feed-bar being provided with feeding cloth-pressers one of which is rigidly secured to said feedbar, the other of said cloth-pressers being resiliently mounted to move vertically with or independently of said. rigidly secured cloth-presser.

'3. In a two needle sewing machine, a stitch-forming and cloth-feeding mechanism including an actuating shaft mounted in the sewing machine bracket-arm, a clothresser bar mounted in the head of said arm and provided with a cloth-presser, a frame pivoted on said head, connections between said shaft and said frame for giving to the latter oscillating movements, and a feed-bar mounted in said frame and operatively connected with said shaft to move vertically, said feed-bar being provided with feeding cloth-pressers one of which is rigidly secured to said feed-bar, the other of said cloth-pressers being resiliently mounted to move vertically with or independently of said rigidly secured clothpresser.

4, In a two needle sewing machine, a stitch-forming and cloth-feeding mechanismincluding a frame carrying a needlebar provided with an eye-pointed needle,

a feed-bar mounted in independent bearings in said frame, connections between the actuating mechanism of the sewing machine and said frame for giving to said needle-bar and feed-bar vertical and oscillating movements, said feed-bar being pro vided with feeding cloth-press'ers one of which is rigidly secured to said feed-bar, the other of said cloth-pressers being resiliently mounted to move vertically with or independently of said rigidly secured clothpresser.

5. In a.two needle sewing machine, a stitch-forming and cloth-feeding mechanism including an actuating shaft, a presser-bar mounted in the head of the bracket-arm of the sewing machine and provided with a cloth-presser, a frame pivoted on said head, a needle-bar mounted in said frame, connections between said frame and said actuating shaft including an eccentric for giving to said frame oscillating movements; a feed-bar mounted in said frame and provided at its lower end with a rigidly secured and a yieldingly mounted feeding cloth-presser, and connections between said feed-bar and said cloth-presser bar and between the latter and said eccentric for alternately giving to said feed-bar and cloth-presser bar vertica l movements.

6. In a two needle sewing machine, stitch-forming and cloth-actuating mechanism including a presser-bar mounted'in the head of the sewing machine bracket arm, a cl oth-presser. carried by said bar, an oscillating frame pivoted upon said head, means for giving to said frame oscillating movements, a needle-bar mounted to move vertically in said frame and carrying an eye pointed needle, a hollow feed-bar having rigidly secured to it a feeding cloth-presser,

an auxiliary feed-bar mounted in said hol-- low bar and provided with an auxiliary feeding cloth-presser, and a spring mounted in said hollow bar for giving to said auxiliary feeding clothresser movements in the direction of the length of said feed-bar independent of the like movements of said rigidly secured feeding cloth-presser.

7. In a two needle sewing machine, a

stitch-forming and cloth-feeding mechatric carried by said actuating shaft and operatively connected with said frame for giving to the latter oscillating movements.

8. In a two needle sewing machine, .a stitch-forming and cl0th feeding mechanism including an actuating shaft mounted in the sewing machine bracket arm, a

'cloth-presser bar mounted in the head of said arm and provided with a cloth-presser, a frame pivoted to said head, connections including an eccentric between said actuating shaft and said frame for giving to the latter oscillating movements, 2. resiliently depressed feeding clothresser carrying element carried by said frame and provided with a yieldingly mounted and a rigidly secured feeding cloth-presser, and

vertical movements.

9. In a two needle sewing machine, a stitch-forming and cloth-feeding mechanism including an actuating shaft, a clothpresser bar provided with a cloth-presser, arframe in which is mounted a vertically actuated needle-bar provided with an eyepointed needle, a feed-bar having vertical movements in said frame and carrying at its lower end a yieldingly mounted feeding clotli-presser and an independently mounted and rigidly secured bracket provided with a feeding cloth-presser, an eccentric carried by said actuating shaft and operatively connected with said frame for giving to the latter oscillating movements, and a guiding member carried by said yieldingly mounted feeding cloth-presser, said guiding member coacting with said bracket to hold said yieldingly mounted feeding clothpresser against movement about the axis of said feedbar.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses. v

. DONALD NOBLE.

Witnesses:

' ABBIE M. DONIHEE,

THOMAS CAMPBELL. 

